Microsoft.Azure.OperationalInsights returns 'Forbidden' message for service principle-CodePudding

I am trying to read insights of a resource in azure. I am getting the error as:

Operation returned an invalid status code 'Forbidden'

The service principle has been given 'Log Analytics Reader' role on the subscription of the workspace.

Microsoft.Azure.Management.ResourceManager.Fluent.Authentication.AzureCredentials credentials =
 Microsoft.Azure.Management.ResourceManager.Fluent.SdkContext.AzureCredentialsFactory.FromServicePrincipal(
 "clientId", 
 "clientSecret", 
 "tenantId", 
 Microsoft.Azure.Management.ResourceManager.Fluent.AzureEnvironment.AzureGlobalCloud);

var client = new Microsoft.Azure.OperationalInsights.OperationalInsightsDataClient(credentials);
client.WorkspaceId = @"workspaceId";
var results = client.QueryWithHttpMessagesAsync("union * | take 5").Result;

The solution to

And Add the below permission to your service principle.

And grant admin consent permission to your service principle for the API permission.

once you have granted the permission for service principle you would be able to read the logs .

For more information on the same thing using powershell please refer this Blog .