Replacing the SecurityTokenValidationException (which was not right as the token was valid: we are in the token valid callback) by an UnauthorizedAccessException
Replacing the SecurityTokenValidationException (which was not right as the token was valid: we are in the token valid callback) by an UnauthorizedAccessException

Azure-Samples/active-directory-dotnet-webapp-multitenant-openidconnect,Azure-Samples/active-directory-dotnet-webapp-multitenant-openidconnect,Azure-Samples/active-directory-dotnet-webapp-multitenant-openidconnect