Dynamically change the APIKey 

Hi Team, 

I have added the following D.I. in my code,

services.AddSendGrid(options =>
{
    options.ApiKey = Environment.GetEnvironmentVariable("SENDGRID_API_KEY");
})

Now I am getting SendGridClient in my service with the APIKey. But I want to change the API key before calling "SendEmailAsync". Can you please suggest any possible way for this.

