Add-in is already requesting an access token in Microsoft outlook - outlook

Question

I am working on an outlook addin to set signature. I'm trying to obtain the access token using the code below, I need to use the token to access Microsoft graph api to access logged in user content:
Office.initialize = function (reason) {
Office.actions.associate("onMessageComposeHandler", getToken());
};
function getToken(){
try{
let accessToken = Office.auth.getAccessToken().then((res)=>{
console.log(res)
})
}catch(error){
console.log(error)
}
}
I have been trying different ways as indicated in the documentation and other solutions either it displays an error that another request has been made and currently it is displaying this error, any ideas on how to solve this issue will be highly appreciated:
OSF.DDA.Error {name: 'Error occurred in the authentication request from Office.', message: 'An unexpected error occurred in the client.', code: 13006}
I have enabled the SSO as outlined Enable single sign-on (SSO) in an Office Add-in. The addin is already configured in a microsoft test tenant. I'm still getting the same error, I have also tried to change the code as in the documentation:
async function getToken(){
try{
let accessToken = await
OfficeRuntime.auth.getAccessToken({allowSignInPrompt:true})
console.log(accessToken)
}catch(error){
console.log(error)
}
}

Answer 1

You need to enable SSO in the add-in, see Enable single sign-on (SSO) in an Office Add-in for more information. Be aware, you need to grant administrator consent to the add-in. This procedure is only needed when you're developing the add-in. When your production add-in is deployed to AppSource or the Microsoft 365 admin center, users will individually trust it or an admin will consent for the organization at installation.