Re-added support for token-only logins

src/Discord.Net/API/Client/Rest/Login.cs

@@ -5,14 +5,14 @@ namespace Discord.API.Client.Rest
     [JsonObject(MemberSerialization.OptIn)]
     public sealed class LoginRequest : IRestRequest<LoginResponse>
 	{
-        string IRestRequest.Method => "POST";
+        string IRestRequest.Method => Email != null ? "POST" : "GET";
         string IRestRequest.Endpoint => $"auth/login";
         object IRestRequest.Payload => this;
         bool IRestRequest.IsPrivate => false;
 
-        [JsonProperty("email")]
+        [JsonProperty("email", NullValueHandling = NullValueHandling.Ignore)]
 		public string Email { get; set; }
-		[JsonProperty("password")]
+		[JsonProperty("password", NullValueHandling = NullValueHandling.Ignore)]
 		public string Password { get; set; }
     }
 

src/Discord.Net/DiscordClient.cs

@@ -168,13 +168,13 @@ namespace Discord
             await BeginConnect(email, password, null).ConfigureAwait(false);
             return ClientAPI.Token;
         }
-        /*/// <summary> Connects to the Discord server with the provided token. </summary>
+        /// <summary> Connects to the Discord server with the provided token. </summary>
         public async Task Connect(string token)
         {
             if (token == null) throw new ArgumentNullException(token);
 
             await BeginConnect(null, null, token).ConfigureAwait(false);
-        }*/
+        }
 
         private async Task BeginConnect(string email, string password, string token = null)
         {
@@ -222,7 +222,7 @@ namespace Discord
                 throw;
             }
         }
-        private async Task Login(string email, string password, string token = null)
+        private async Task Login(string email = null, string password = null, string token = null)
         {
             string tokenPath = null, oldToken = null;
             byte[] cacheKey = null;

src/Discord.Net/Models/Message.cs

@@ -208,7 +208,7 @@ namespace Discord
         /// <summary> Returns if this message was sent from the logged-in accounts. </summary>
         public bool IsAuthor => User != null && User.Id == Client.CurrentUser?.Id;
 
-		internal Message(ulong id, Channel channel, User user)
+        internal Message(ulong id, Channel channel, User user)
 		{
             Id = id;
             Channel = channel;