Microsoft Copilot Embedded in the SharePoint

Hi experts,

I have developed a Copilot Agent to assist to search the documents in the SharePoint document libraries. In that case I have registered the App in Azure and set the API Permission as follows.

1. Microsoft Graph -> Application Permission

          1.1. Sites.FullControl.All

          1.2. Files.Read.All

          1.3. Sites.Read.All

          1.4. User.Read.All

      2. SharePoint -> Application Permission

         2.1. Sites.FullControl.All

         2.2. Sites.Read.All

         2.3. User.Read.All

      3. Created Client Secret

      4. I did the following settings in Copilot Studio under Authentication.

         4.1. I have selected "Authenticate manually" and turn "Require users to sign in" off.

         4.2. Then, gave the Client ID and Client secret.

         4.3. Set the "profile openid Sites.Read.All Files.Read.All" under Scopes and Save.

         4.4. After all the configurations are done, I get the embed code and insert it into SharePoint page.

My objective is to give the better user experience to the internal users, and I do not need to use this "Sign in" option. Even I set all above settings, it is asking me to "Sign in".

How can I avoid this matter?
I really appreciate it if someone can help me out on this regard.

Thanks in advance,

Wiki.