feat(auth): Adding documentation for getCurrentUser (#5064)

* Adding support for getCurrentUser

* addressing PR comments

* Fix for not having getcurrentuser in ios documentation

* reverting ios id change

* Update src/fragments/lib/auth/android/signin_next_steps/80_current_user.mdx

Co-authored-by: Tyler Roach <[email protected]>

* Update src/fragments/lib/auth/android/signin_next_steps/80_current_user.mdx

Co-authored-by: Tyler Roach <[email protected]>

* Addressed PR comments

---------

Co-authored-by: Tyler Roach <[email protected]>

Author: gpanshu

src/fragments/lib/auth/android/signin_next_steps/80_current_user.mdx

@@ -0,0 +1,55 @@
+### Get Current User
+
+This call fetches the current logged in user and should be used after a user has been successfully signed in.
+If the user is signed in, it will return the current userId and username.
+Note: An empty string will be assigned to userId and/or username, if the values are not present in the accessToken.
+
+<BlockSwitcher>
+
+<Block name="Java">
+
+```java
+ try {
+    Amplify.Auth.getCurrentUser(
+           result -> Log.i("AuthQuickstart", "Current user details are:" + result.toString(),
+           error -> Log.e("AuthQuickstart", "getCurrentUser failed with an exception: " + error)
+    );
+ } catch (Exception error) {
+    Log.e("AuthQuickstart", "unexpected error: " + error);
+ }
+```
+</Block>
+
+<Block name="Kotlin - Callbacks">
+
+```kotlin
+Amplify.Auth.getCurrentUser({
+    Log.i("AuthQuickStart", "Current user details are: $it")},{
+    Log.e("AuthQuickStart", "getCurrentUser failed with an exception: $it")
+})
+```
+</Block>
+
+<Block name="Kotlin - Coroutines">
+
+```kotlin
+try {
+    val result = Amplify.Auth.getCurrentUser()
+    Log.i("AuthQuickstart", "Current user details are: $result")
+} catch (error: Exception) {
+    Log.e("AuthQuickstart", "getCurrentUser failed with an exception: $error")
+}
+```
+</Block>
+
+<Block name="RxJava">
+
+```java
+  RxAmplify.Auth.getCurrentUser().subscribe(
+        result -> Log.i("AuthQuickStart getCurrentUser: " + result.toString()),
+        error -> Log.e("AuthQuickStart", error.toString())
+ );
+```
+</Block>
+
+</BlockSwitcher>

src/fragments/lib/auth/native_common/signin_next_steps/common.mdx

@@ -58,12 +58,16 @@ import android5 from "/src/fragments/lib/auth/android/signin_next_steps/60_confi
 
 <Fragments fragments={{android: android5}} />
 
+import android6 from "/src/fragments/lib/auth/android/signin_next_steps/80_current_user.mdx";
+
+<Fragments fragments={{android: android6}} />
+
 ### Done
 
 import ios6 from "/src/fragments/lib/auth/ios/signin_next_steps/70_done.mdx";
 
 <Fragments fragments={{ios: ios6}} />
 
-import android6 from "/src/fragments/lib/auth/android/signin_next_steps/70_done.mdx";
+import android7 from "/src/fragments/lib/auth/android/signin_next_steps/70_done.mdx";
 
-<Fragments fragments={{android: android6}} />
+<Fragments fragments={{android: android7}} />