feat: Implemented log in, sign up and sign out

android/app/build.gradle

@@ -1,4 +1,5 @@
 apply plugin: "com.android.application"
+apply plugin: "com.google.gms.google-services"
 
 import com.android.build.OutputFile
 

android/app/google-services.json

@@ -0,0 +1,47 @@
+{
+  "project_info": {
+    "project_number": "836000423008",
+    "project_id": "unilab-1",
+    "storage_bucket": "unilab-1.appspot.com"
+  },
+  "client": [
+    {
+      "client_info": {
+        "mobilesdk_app_id": "1:836000423008:android:16eb8491d1954f00def705",
+        "android_client_info": {
+          "package_name": "com.browses3"
+        }
+      },
+      "oauth_client": [
+        {
+          "client_id": "836000423008-ad4pat0937g9buk08svsqo8f704m863g.apps.googleusercontent.com",
+          "client_type": 1,
+          "android_info": {
+            "package_name": "com.browses3",
+            "certificate_hash": "622d2ff10752290e552a9b81b4540078f152dee4"
+          }
+        },
+        {
+          "client_id": "836000423008-gk2g4i27gr34si5qh9t8o9euf46n8p78.apps.googleusercontent.com",
+          "client_type": 3
+        }
+      ],
+      "api_key": [
+        {
+          "current_key": "AIzaSyCjPEOluTX1mqpU8KbYSSeSj5pLcM0lDEA"
+        }
+      ],
+      "services": {
+        "appinvite_service": {
+          "other_platform_oauth_client": [
+            {
+              "client_id": "836000423008-gk2g4i27gr34si5qh9t8o9euf46n8p78.apps.googleusercontent.com",
+              "client_type": 3
+            }
+          ]
+        }
+      }
+    }
+  ],
+  "configuration_version": "1"
+}

android/build.gradle

@@ -27,6 +27,7 @@ buildscript {
         classpath("de.undercouch:gradle-download-task:5.0.1")
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
+        classpath("com.google.gms:google-services:4.3.12")
     }
 }