Improve signout task

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/auth/SessionParamsStore.kt

@@ -25,5 +25,5 @@ internal interface SessionParamsStore {
 
     fun save(sessionParams: SessionParams): Try<SessionParams>
 
-    fun delete()
+    fun delete(): Try<Unit>
 }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/auth/db/RealmSessionParamsStore.kt

@@ -50,14 +50,16 @@ internal class RealmSessionParamsStore(private val mapper: SessionParamsMapper,
         return sessionParams
     }
 
-    override fun delete() {
-        val realm = Realm.getInstance(realmConfiguration)
-        realm.executeTransaction {
-            it.where(SessionParamsEntity::class.java)
-                    .findAll()
-                    .deleteAllFromRealm()
+    override fun delete(): Try<Unit> {
+        return Try {
+            val realm = Realm.getInstance(realmConfiguration)
+            realm.executeTransaction {
+                it.where(SessionParamsEntity::class.java)
+                        .findAll()
+                        .deleteAllFromRealm()
+            }
+            realm.close()
         }
-        realm.close()
     }
 
 }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/signout/SignOutTask.kt

@@ -30,7 +30,7 @@ internal class DefaultSignOutTask(private val signOutAPI: SignOutAPI,
     override fun execute(params: Unit): Try<Unit> {
         return executeRequest<Unit> {
             apiCall = signOutAPI.signOut()
-        }.map {
+        }.flatMap {
             // TODO Clear DB, media cache, etc.
             sessionParamsStore.delete()
         }