The issuer of the security token was not recognized by the IssuerNameRegistry

For the federated folks out there, you may encounter an error message like the following: System.IdentityModel.Tokens.SecurityTokenException, System.IdentityModel, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 ID4175: The issuer of the security token was not recognized by the IssuerNameRegistry. To accept security tokens from this issuer, configure the IssuerNameRegistry to return a valid name for this …