Fixed unit tests related to #144 PR

Author: gpailler

MegaApiClient.Tests/Login.cs

@@ -209,10 +209,12 @@ public void GenerateAuthInfos_InvalidCredentials_Throws(string email, string pas
       Assert.Throws<ArgumentNullException>(expectedMessage, () => this.context.Client.GenerateAuthInfos(email, password));
     }
 
-    [Theory, InlineData("[email protected]", "password", "{'Email':'[email protected]','Hash':'ObELy57HULI','PasswordAesKey':'ZAM5cl5uvROiXwBSEp98sQ=='}")]
-    public void GenerateAuthInfos_ValidCredentials_Succeeds(string email, string password, string expectedResult)
+    [Theory]
+    [InlineData("[email protected]", "password", null, "{'Email':'[email protected]','Hash':'ObELy57HULI','PasswordAesKey':'ZAM5cl5uvROiXwBSEp98sQ==','MFAKey':null}")]
+    [InlineData("[email protected]", "password", "mfa", "{'Email':'[email protected]','Hash':'ObELy57HULI','PasswordAesKey':'ZAM5cl5uvROiXwBSEp98sQ==','MFAKey':'mfa'}")]
+    public void GenerateAuthInfos_ValidCredentials_Succeeds(string email, string password, string mfa, string expectedResult)
     {
-      var authInfos = this.context.Client.GenerateAuthInfos(email, password);
+      var authInfos = this.context.Client.GenerateAuthInfos(email, password, mfa);
       var result = JsonConvert.SerializeObject(authInfos, Formatting.None).Replace('\"', '\'');
 
       Assert.Equal(expectedResult, result);

MegaApiClient/MegaApiClient.cs

@@ -1241,14 +1241,7 @@ private IEnumerable<int> ComputeChunksSizesToUpload(long[] chunksPositions, long
 
     public class AuthInfos
     {
-      public AuthInfos(string email, string hash, byte[] passwordAesKey)
-      {
-        this.Email = email;
-        this.Hash = hash;
-        this.PasswordAesKey = passwordAesKey;
-      }
-
-      public AuthInfos(string email, string hash, byte[] passwordAesKey, string mfaKey)
+      public AuthInfos(string email, string hash, byte[] passwordAesKey, string mfaKey = null)
       {
         this.Email = email;
         this.Hash = hash;