Hi Guys -
I was having the same issue but I fixed it. I actually manually found out the user name and then inputted that instead of relying on the link.
Step 1: In order to find ur username for SendGrid, first, go to the SendGrid resource and then click properties. Now copy the resource id.
Step 2: Now, in the azure online shell, open bash and type the following command:
az resource show --ids [THE COPIED RESOURCE ID]
Make sure to replace [THE COPIED RESOURCE ID] with the resource Id you copied in step 1
Step 3: In the json string that the terminal outputs, look for the username property and note that down
Step 4: After you do that you can manually go to sendgrid.com and then enter the username you just retrieved and then the password which you used to sign up with.
Cheers!