Create exchange API by name (#695)

Author: bezysoftware

src/ExchangeSharp/API/Exchanges/_Base/ExchangeAPI.cs

@@ -405,6 +405,18 @@ public static async Task<T> CreateExchangeAPIAsync<T>() where T : ExchangeAPI
 			return (T)await InitializeAPIAsync(typeof(T));
 		}
 
+		/// <summary>
+		/// Create an exchange api, by-passing any cache. Use this method for cases
+		/// where you need multiple instances of the same exchange, for example
+		/// multiple credentials.
+		/// </summary>
+		/// <returns>Created exchange api</returns>
+		public static async Task<IExchangeAPI> CreateExchangeAPIAsync(string name)
+		{
+			var type = ExchangeName.GetExchangeType(name);
+			return await InitializeAPIAsync(type);
+		}
+
 		/// <summary>
 		/// Get a cached exchange API given an exchange name (see ExchangeName class)
 		/// </summary>