Add method to update displayName and photoUrl

Author: cabauman

src/Firebase.Auth/FirebaseAuthLink.cs

@@ -89,6 +89,15 @@ public async Task<FirebaseAuthLink> GetFreshAuthAsync()
             return this;
         }
 
+        public async Task<FirebaseAuthLink> UpdateProfileAsync(string displayName, string photoUrl)
+        {
+            var auth = await this.AuthProvider.UpdateProfileAsync(this.FirebaseToken, displayName, photoUrl).ConfigureAwait(false);
+
+            this.CopyPropertiesLocally(auth.AuthProvider, auth);
+
+            return this;
+        }
+
         protected void OnFirebaseAuthRefreshed(FirebaseAuth auth)
         {
             this.FirebaseAuthRefreshed?.Invoke(this, new FirebaseAuthEventArgs(auth));

src/Firebase.Auth/FirebaseAuthProvider.cs

@@ -25,6 +25,9 @@ public class FirebaseAuthProvider : IDisposable, IFirebaseAuthProvider
         private const string GoogleSetAccountUrl = "https://www.googleapis.com/identitytoolkit/v3/relyingparty/setAccountInfo?key={0}";
         private const string GoogleCreateAuthUrl = "https://www.googleapis.com/identitytoolkit/v3/relyingparty/createAuthUri?key={0}";
 
+        private const string ProfileDeleteDisplayName = "DISPLAY_NAME";
+        private const string ProfileDeletePhotoUrl = "PHOTO_URL";
+
         private readonly FirebaseConfig authConfig;
         private readonly HttpClient client;
 
@@ -160,6 +163,39 @@ public async Task<FirebaseAuthLink> CreateUserWithEmailAndPasswordAsync(string e
             return signup;
         }
 
+        /// <summary>
+        /// Updates profile (displayName and photoUrl) of user tied to given user token.
+        /// </summary>
+        /// <param name="displayName"> The new display name. </param>
+        /// <param name="photoUrl"> The new photo URL. </param>
+        /// <returns> The <see cref="FirebaseAuthLink"/>. </returns>
+        public async Task<FirebaseAuthLink> UpdateProfileAsync(string firebaseToken, string displayName, string photoUrl)
+        {
+            StringBuilder sb = new StringBuilder($"{{\"idToken\":\"{firebaseToken}\"");
+            if (!string.IsNullOrWhiteSpace(displayName) && !string.IsNullOrWhiteSpace(photoUrl))
+            {
+                sb.Append($",\"displayName\":\"{displayName}\",\"photoUrl\":\"{photoUrl}\"");
+            }
+            else if (!string.IsNullOrWhiteSpace(displayName))
+            {
+                sb.Append($",\"displayName\":\"{displayName}\"");
+                sb.Append($",\"deleteAttribute\":[\"{ProfileDeletePhotoUrl}\"]");
+            }
+            else if (!string.IsNullOrWhiteSpace(photoUrl))
+            {
+                sb.Append($",\"photoUrl\":\"{photoUrl}\"");
+                sb.Append($",\"deleteAttribute\":[\"{ProfileDeleteDisplayName}\"]");
+            }
+            else
+            {
+                sb.Append($",\"deleteAttribute\":[\"{ProfileDeleteDisplayName}\",\"{ProfileDeletePhotoUrl}\"]");
+            }
+
+            sb.Append($",\"returnSecureToken\":true}}");
+
+            return await this.ExecuteWithPostContentAsync(GoogleSetAccountUrl, sb.ToString()).ConfigureAwait(false);
+        }
+
         /// <summary>
         /// Deletes the user with a recent Firebase Token.
         /// </summary>

src/Firebase.Auth/IFirebaseAuthProvider.cs

@@ -53,6 +53,14 @@ public interface IFirebaseAuthProvider
         /// <returns> The <see cref="FirebaseAuth"/>. </returns>
         Task<FirebaseAuthLink> SignInWithCustomTokenAsync(string customToken);
 
+        /// <summary>
+        /// Updates profile (displayName and photoUrl) of user tied to given user token.
+        /// </summary>
+        /// <param name="displayName"> The new display name. </param>
+        /// <param name="photoUrl"> The new photo URL. </param>
+        /// <returns> The <see cref="FirebaseAuthLink"/>. </returns>
+        Task<FirebaseAuthLink> UpdateProfileAsync(string firebaseToken, string displayName, string photoUrl);
+
         /// <summary>
         /// Links the authenticated user represented by <see cref="auth"/> with an email and password. 
         /// </summary>