OAuth2 Http

[hmarois21/hotmail_com]

I successfuly made an httprequest to have a token stored in a table

But I cant use expression in additional http header:

"Authorization":"Bearer "+cell(tableFromJSON({users.admin.trackers.OAuth:tracker$value}), "access_token")

doesnt work

[sergey_eritsyan/tibbo_com]

Hello! Please describe in details what do you need to get from expression? May be you can attach some screenshots?