When I am trying to create an authentication header using the below code. I am getting an error saying "AADSTS70002: Error validating credentials. AADSTS50012: Invalid client secret is provided." Now, I am sure, that the secret which I used in the code is not matching with the one used in my AAD app registration. Can anybody help me on how to get the client secret, from my app registrations or how to add a new application identifier in my O365 account directory.
private string GetAuthenticationHeader(AuthenticationInformation authenticationInformation){
try{
return RetryHelper.InvokeWithRetries(() =>
{
var clientCredential = new ClientCredential(authenticationInformation.ClientId, authenticationInformation.AppSecret);
var ac = new AuthenticationContext(authenticationInformation.Authority);
AuthenticationResult ar = ac.AcquireToken(authenticationInformation.Resource, clientCredential);
return ar.CreateAuthorizationHeader();
});
}
catch (Exception ex){
return ex.Message;
}
}