diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index cbd0d10..8ae1d72 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -56,6 +56,14 @@
                 android:name=".activities.LoginActivity"
                 android:exported="false"
                 android:theme="@style/Theme.BarcodeScannerForEmployees"/>
+        <activity
+                android:name=".activities.AccountSettingsActivity"
+                android:exported="false"
+                android:theme="@style/Theme.BarcodeScannerForEmployees"/>
+        <activity
+                android:name=".activities.GroupActivity"
+                android:exported="false"
+                android:theme="@style/Theme.BarcodeScannerForEmployees"/>
         <activity
                 android:name=".activities.FullscreenActivity"
                 android:configChanges="orientation|keyboardHidden|screenSize"
@@ -69,7 +77,7 @@
         
         <provider
                 android:name="androidx.core.content.FileProvider"
-                android:authorities="com.google.firebase.components.activities.MainActivity.provider;com.google.firebase.components.activities.FullscreenActivity.provider;com.google.firebase.components.activities.AddAbstractProductActivity.provider;com.google.firebase.components.activities.AddProductActivity.provider;com.google.firebase.components.activities.ExpiryCalendarActivity.provider;com.google.firebase.components.activities.FindBarcodelessAbstractProduct.provider;com.google.firebase.components.activities.ExpiryCalendarGroupActivity.provider"
+                android:authorities="com.google.firebase.components.activities.MainActivity.provider;com.google.firebase.components.activities.FullscreenActivity.provider;com.google.firebase.components.activities.AddAbstractProductActivity.provider;com.google.firebase.components.activities.AddProductActivity.provider;com.google.firebase.components.activities.ExpiryCalendarActivity.provider;com.google.firebase.components.activities.FindBarcodelessAbstractProduct.provider;com.google.firebase.components.activities.ExpiryCalendarGroupActivity.provider;com.google.firebase.components.activities.AccountSettingsActivity.provider;com.google.firebase.components.activities.GroupActivity.provider"
                 android:exported="false"
                 android:grantUriPermissions="true">
             <meta-data
diff --git a/app/src/main/java/org/foxarmy/barcodescannerforemployees/Net.kt b/app/src/main/java/org/foxarmy/barcodescannerforemployees/Net.kt
index 5136aa0..5a07b40 100644
--- a/app/src/main/java/org/foxarmy/barcodescannerforemployees/Net.kt
+++ b/app/src/main/java/org/foxarmy/barcodescannerforemployees/Net.kt
@@ -10,6 +10,8 @@ import kotlin.concurrent.thread
 
 class Net {
     var language = "en-US"
+    var server = "bsfe.foxarmy.org"
+    var token = ""
 
     fun requestProductFromOnlineDB(barcode: String): String {
         var response = ""
@@ -38,8 +40,7 @@ class Net {
         }
     }
 
-    fun registerAccount(server: String, username: String, password: String): String {
-        var token = ""
+    fun registerAccount(username: String, password: String): Response {
         lateinit var response: Response
         thread {
             val client = OkHttpClient()
@@ -59,10 +60,10 @@ class Net {
             response = client.newCall(request).execute()
         }.join()
 
-        return response.body!!.string()
+        return response
     }
 
-    fun login(server: String, username: String, password: String): String {
+    fun login(username: String, password: String): Response {
         lateinit var response: Response
         thread {
             val client = OkHttpClient()
@@ -81,10 +82,10 @@ class Net {
             response = client.newCall(requestLogin).execute()
         }.join()
 
-        return response.body!!.string()
+        return response
     }
 
-    fun uploadAbstractProduct(server: String, groupId: Int, abstractProduct: AbstractProduct, imageFile: File, token: String): String {
+    fun uploadAbstractProduct(groupId: Int, abstractProduct: AbstractProduct, imageFile: File): Response {
         lateinit var response: Response
 
         thread {
@@ -113,12 +114,10 @@ class Net {
             response = client.newCall(request).execute()
         }.join()
 
-        val responseText = response.body!!.string()
-
-        return responseText
+        return response
     }
 
-    fun changeUsername(server: String, token: String, newUsername: String): String {
+    fun changeUsername( newUsername: String): Response {
 
         lateinit var response: Response
 
@@ -138,12 +137,10 @@ class Net {
             response = client.newCall(request).execute()
         }.join()
 
-        val responseText = response.body!!.string()
-
-        return responseText
+        return response
     }
 
-    fun changePassword(server: String, token: String, newPassword: String): String {
+    fun changePassword(newPassword: String): Response {
 
         lateinit var response: Response
 
@@ -163,6 +160,70 @@ class Net {
             response = client.newCall(request).execute()
         }.join()
 
+        return response
+    }
+
+    fun createGroup(name: String, password: String): Response {
+        lateinit var response: Response
+
+        thread {
+            val client = OkHttpClient()
+
+            val body = FormBody.Builder()
+
+            val requestBody = body.build()
+
+            val request = Request.Builder().url("https://$server/api/group/create/$name")
+                .post(requestBody)
+                .addHeader("Authorization", "Bearer $token")
+                .addHeader("accept-language", language)
+                .build()
+            response = client.newCall(request).execute()
+        }.join()
+
+
+        return changeGroupPassword(name, password)
+    }
+
+    fun changeGroupPassword(name: String, password: String): Response {
+        lateinit var response: Response
+
+        thread {
+
+            val groupId = getGroupId(name);
+
+            val client = OkHttpClient()
+
+            val body = FormBody.Builder()
+            body.add("password", password)
+
+            val requestBody = body.build()
+
+            val request = Request.Builder().url("https://$server/api/group/password/$groupId")
+                .post(requestBody)
+                .addHeader("Authorization", "Bearer $token")
+                .addHeader("accept-language", language)
+                .build()
+            response = client.newCall(request).execute()
+        }.join()
+
+        return response
+    }
+
+    fun getGroupId(name: String): String {
+        lateinit var response: Response
+
+        thread {
+            val client = OkHttpClient()
+
+            val request = Request.Builder().url("https://$server/api/group/byName/$name")
+                .get()
+                .addHeader("Authorization", "Bearer $token")
+                .addHeader("accept-language", language)
+                .build()
+            response = client.newCall(request).execute()
+        }.join()
+
         val responseText = response.body!!.string()
 
         return responseText
diff --git a/app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/AccountSettingsActivity.kt b/app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/AccountSettingsActivity.kt
index 1e26791..ba7b685 100644
--- a/app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/AccountSettingsActivity.kt
+++ b/app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/AccountSettingsActivity.kt
@@ -29,16 +29,20 @@ class AccountSettingsActivity : AppCompatActivity() {
             EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
         )
 
-        val server = sharedPreferences.getString("server", "bsfe.foxarmy.org")
-        val token = sharedPreferences.getString("token", "")
         val net = Net()
 
+        net.server = sharedPreferences.getString("server", "bsfe.foxarmy.org")!!
+        net.language = sharedPreferences.getString("language", "")!!
+        net.token = sharedPreferences.getString("token", "")!!
+
         binding.saveUsernameButton.setOnClickListener {
-            Toast.makeText(this, net.changeUsername(server!!, token!!, binding.newUsernameTextEdit.text.toString()), Toast.LENGTH_LONG).show()
+            val response = net.changeUsername(binding.newUsernameTextEdit.text.toString())
+            Toast.makeText(this, response.body!!.string(), Toast.LENGTH_LONG).show()
         }
 
         binding.savePasswordButton.setOnClickListener {
-            Toast.makeText(this, net.changePassword(server!!, token!!, binding.newPasswordTextEdit.text.toString()), Toast.LENGTH_LONG).show()
+            val response = net.changePassword(binding.newPasswordTextEdit.text.toString())
+            Toast.makeText(this, response.body!!.string(), Toast.LENGTH_LONG).show()
         }
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/AddAbstractProductActivity.kt b/app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/AddAbstractProductActivity.kt
index 5acc7c1..8008cf1 100644
--- a/app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/AddAbstractProductActivity.kt
+++ b/app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/AddAbstractProductActivity.kt
@@ -161,14 +161,14 @@ class AddAbstractProductActivity : AppCompatActivity() {
                     EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
                     EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
                 )
-                val language = sharedPreferences.getString("language", "en-US")
-                n.language = language!!
-                val token = sharedPreferences.getString("token", "")
-                val response = n.uploadAbstractProduct("bsfe.foxarmy.org", 1, abstractProduct, File(pictureFile.absolutePath), token!!);
 
-                Toast.makeText(this, response, Toast.LENGTH_LONG).show()
+                n.language = sharedPreferences.getString("language", "en-US")!!
+                n.server = sharedPreferences.getString("server", "")!!
+                n.token = sharedPreferences.getString("token", "")!!
+                val response = n.uploadAbstractProduct(1, abstractProduct, File(pictureFile.absolutePath));
+
+                Toast.makeText(this, response.body!!.string(), Toast.LENGTH_LONG).show()
             }
-
             finish()
         }
 
diff --git a/app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/GroupActivity.kt b/app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/GroupActivity.kt
new file mode 100644
index 0000000..704e755
--- /dev/null
+++ b/app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/GroupActivity.kt
@@ -0,0 +1,54 @@
+package org.foxarmy.barcodescannerforemployees.activities
+
+import android.content.Intent
+import android.os.Bundle
+import android.widget.Toast
+import androidx.appcompat.app.AppCompatActivity
+import androidx.security.crypto.EncryptedSharedPreferences
+import androidx.security.crypto.MasterKeys
+import org.foxarmy.barcodescannerforemployees.Net
+import org.foxarmy.barcodescannerforemployees.databinding.ActivityGroupBinding
+
+class GroupActivity : AppCompatActivity() {
+
+    private lateinit var binding: ActivityGroupBinding
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        binding = ActivityGroupBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        val masterKeyAlias = MasterKeys.getOrCreate(MasterKeys.AES256_GCM_SPEC)
+
+        val sharedPreferences = EncryptedSharedPreferences.create(
+            "sensitive",
+            masterKeyAlias,
+            applicationContext,
+            EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
+            EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
+        )
+
+        binding.createGroupButton.setOnClickListener {
+            val groupName = binding.groupNameTextEdit.text.toString()
+            val groupPassword = binding.groupPasswordTextEdit.text.toString()
+
+            val n = Net()
+            n.language = sharedPreferences.getString("language", "en-US")!!
+            n.server = sharedPreferences.getString("server", "")!!
+            n.token = sharedPreferences.getString("token", "")!!
+
+            val response = n.createGroup(groupName, groupPassword)
+            val responseText = response.body!!.string()
+            Toast.makeText(this, responseText, Toast.LENGTH_LONG).show()
+
+            if (response.code == 200) {
+                Toast.makeText(this, responseText, Toast.LENGTH_LONG).show()
+                sharedPreferences.edit().putStringSet("groups", setOf(responseText))
+                val intent = Intent(this, MainActivity::class.java)
+                startActivity(intent)
+                finish()
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/LoginActivity.kt b/app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/LoginActivity.kt
index f5ce131..e2292a9 100644
--- a/app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/LoginActivity.kt
+++ b/app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/LoginActivity.kt
@@ -41,13 +41,16 @@ class LoginActivity : AppCompatActivity() {
             sharedPreferences.edit().putString("language", language).apply()
 
             val n = Net()
-            n.language = language
+            n.language = sharedPreferences.getString("language", "en-US")!!
+            n.server = server
 
-            val response = n.login(server, username, password)
-            if (response.length < 40) {
-                Toast.makeText(this, response, Toast.LENGTH_SHORT).show()
+            val response = n.login(username, password)
+            val responseText = response.body!!.string()
+            if (response.code != 200) {
+                Toast.makeText(this, responseText, Toast.LENGTH_SHORT).show()
             } else {
-                sharedPreferences.edit().putString("token", response).apply()
+                sharedPreferences.edit().putString("token", responseText).apply()
+                sharedPreferences.edit().putString("servre", server).apply()
                 val intent = Intent(this, MainActivity::class.java)
                 startActivity(intent)
                 finish()
@@ -60,18 +63,21 @@ class LoginActivity : AppCompatActivity() {
             val password = binding.passwordTextEdit.text.toString()
             val language = resources.getStringArray(R.array.languages)[binding.languageSpinner.selectedItemPosition]
             sharedPreferences.edit().putString("language", language).apply()
+            sharedPreferences.edit().putString("server", server).apply()
 
             val n = Net()
             n.language = language
-
-            val response = n.registerAccount(server, username, password);
-
-            if (response.length < 40) {
-                Toast.makeText(this, response, Toast.LENGTH_SHORT).show();
+            n.server = server
+            val response = n.registerAccount(username, password);
+            val responseText = response.body!!.string()
+            if (response.code != 200) {
+                Toast.makeText(this, responseText, Toast.LENGTH_SHORT).show();
             } else {
-                sharedPreferences.edit().putString("token", response).apply()
+                val token = n.login(username, password)
+                sharedPreferences.edit().putString("token", token.body!!.string()).apply()
+
                 sharedPreferences.edit().putString("server", server).apply()
-                val intent = Intent(this, MainActivity::class.java)
+                val intent = Intent(this, GroupActivity::class.java)
                 startActivity(intent)
                 finish()
             }
diff --git a/app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/NavigatorActivity.kt b/app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/NavigatorActivity.kt
index c2befda..a3467fb 100644
--- a/app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/NavigatorActivity.kt
+++ b/app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/NavigatorActivity.kt
@@ -10,21 +10,25 @@ class NavigatorActivity : Activity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
 
-        var intent = Intent(this, LoginActivity::class.java)
+        var intent = Intent(this, MainActivity::class.java)
 
-        if (isAuthenticated()) {
-            intent = Intent(this, MainActivity::class.java);
+        if (!isInGroup()) {
+            intent = Intent(this, GroupActivity::class.java)
         }
 
+        if (!isAuthenticated()) {
+            intent = Intent(this, LoginActivity::class.java);
+        }
+
+
         startActivity(intent);
-        finish();
+//        finish();
     }
 
     private fun isAuthenticated(): Boolean {
         val masterKeyAlias = MasterKeys.getOrCreate(MasterKeys.AES256_GCM_SPEC)
 
         val sharedPreferences = EncryptedSharedPreferences.create(
-            // passing a file name to share a preferences
             "sensitive",
             masterKeyAlias,
             applicationContext,
@@ -35,4 +39,19 @@ class NavigatorActivity : Activity() {
         val jwt = sharedPreferences.getString("token", "")
         return jwt != ""
     }
+
+    private fun isInGroup(): Boolean {
+        val masterKeyAlias = MasterKeys.getOrCreate(MasterKeys.AES256_GCM_SPEC)
+
+        val sharedPreferences = EncryptedSharedPreferences.create(
+            "sensitive",
+            masterKeyAlias,
+            applicationContext,
+            EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
+            EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
+        )
+
+        val groups = sharedPreferences.getStringSet("groups", emptySet())
+        return groups!!.isNotEmpty()
+    }
 }
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_group.xml b/app/src/main/res/layout/activity_group.xml
new file mode 100644
index 0000000..35144e2
--- /dev/null
+++ b/app/src/main/res/layout/activity_group.xml
@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+                                                   xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
+                                                   android:layout_height="match_parent">
+    <EditText
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:inputType="text"
+            android:ems="10"
+            android:id="@+id/groupNameTextEdit"
+            app:layout_constraintStart_toStartOf="parent" app:layout_constraintEnd_toEndOf="parent"
+            android:hint="@string/group_name" app:layout_constraintTop_toTopOf="parent"
+            android:layout_marginTop="210dp"/>
+    <EditText
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:inputType="textPassword"
+            android:ems="10"
+            android:id="@+id/groupPasswordTextEdit"
+            android:layout_marginTop="27dp"
+            app:layout_constraintTop_toBottomOf="@+id/groupNameTextEdit" android:hint="@string/group_password"
+            app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent"/>
+    <Button
+            android:text="@string/create_group"
+            android:layout_width="91dp"
+            android:layout_height="wrap_content" android:id="@+id/createGroupButton"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@+id/groupPasswordTextEdit"
+            android:layout_marginTop="24dp" app:layout_constraintEnd_toStartOf="@+id/joinGroupButton"
+            android:layout_marginEnd="12dp"/>
+    <Button
+            android:text="@string/join_group"
+            android:layout_width="91dp"
+            android:layout_height="wrap_content" android:id="@+id/joinGroupButton"
+            app:layout_constraintEnd_toEndOf="parent" app:layout_constraintTop_toBottomOf="@+id/groupPasswordTextEdit"
+            android:layout_marginTop="24dp" android:layout_marginStart="12dp"
+            app:layout_constraintStart_toEndOf="@+id/createGroupButton"/>
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/app/src/main/res/values-ru/strings.xml b/app/src/main/res/values-ru/strings.xml
index 968f097..d62438e 100644
--- a/app/src/main/res/values-ru/strings.xml
+++ b/app/src/main/res/values-ru/strings.xml
@@ -103,6 +103,10 @@
     <string name="nav_close">Navigation close</string>
     <string name="new_name">New name</string>
     <string name="new_password">New password</string>
+    <string name="group_name">Group name</string>
+    <string name="group_password">Group password</string>
+    <string name="create_group">Create group</string>
+    <string name="join_group">Join group</string>
     <string-array name="languages">
         <item>en-US</item>
         <item>ru-RU</item>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 57e9dfc..1beb9b3 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -101,6 +101,10 @@
     <string name="nav_close">Navigation close</string>
     <string name="new_name">New name</string>
     <string name="new_password">New password</string>
+    <string name="group_name">Group name</string>
+    <string name="group_password">Group password</string>
+    <string name="create_group">Create group</string>
+    <string name="join_group">Join group</string>
     <string-array name="languages">
         <item>en-US</item>
         <item>ru-RU</item>