In my existing app we are using echosign but while we try to create account it is redirecting adobe

In our existing app, we are using EchoSign. However, when we try to create a test account to support the app, it redirects to Adobe. Our existing base URL (https://api.na1.echosign.com/api/rest/v6/) does not support the newly generated access token—it only works with the Adobe base URL (https://api.in1.adobesign.com/api/rest/v6/). I would like to update only the token, not the base URL. Could anyone provide some insight regarding this?