Access token is empty - HTTP

[Carl__D]

Hello,

I'm hoping someone can help!

I have used an HTTP request to create a Private Channel in Teams and make myself an owner, using OAuth authentication. This works.

I would like to add another owner to this channel so have triggered another HTTP call: 

But this returns: "InvalidAuthenticationToken", "Access token is empty.",

I believe you have to set the Headers to:

Authorization: Bearer {Token}

But how can I get this token?

I have tried a POST:

'https://login.microsoftonline.com/{tenantId}/oauth2/v2.0/token'

With body:

client_id=xxx
&username=xxx
&password=xxx

&scope=user.read%20openid%20profile%20offline_access
&grant_type=password

But continually getting errors so must be missing something!

Any help would be much appreciated. 

Thanks

[AndiRodi]

Hi Carl, 

here is my configuration.

under the red stripe should put you Tenant ID.

The other fields into the HTTP Request's body represents exactly: your tenant ID, you Client ID (APP registration ID) and the related secret key (app registration secret key - from AAD)

hope it's helpful for you.

Andi