Migrating OAuth tokens from one application to another

[#1]

Within my oauth tokens are various custom variables that enable talking to the backend service.

I'm in a situation where I need to migrate those tokens (specifically the variables) from one application/client ID to another.

What are my options? I'm thinking:

1) Get all existing tokens for OldApp

2) Get the custom variables in each token

3) Create a new endpoint in the proxy called "/migrate"

4) Make a POST call with the custom variables and Basic Auth for the new app

5) Policy generates new token(s)

Seem sound?