Refresh the Refresh Token

Access tokens expire after 15 minutes and refresh tokens expire after a year. Merchants are not required to reapprove access after a year; the refresh token's expiration resets to one year after the last successful access token request. You are not required to use an authorization code to make this call.
Below is an example of a request to obtain a new refresh token. We recommend including the header 
v-c-client-correlation-id
 with a unique value for every request to the 
/token
endpoint.
Any token request failure results in an HTTP status code of 500 - Server error. Correct any errors and resend. 
We provide a 6-month grace period to request a new refresh token. The new refresh token will expire one year from the last refresh token request. If the merchant has not had any activity within that grace period, they must be prompted to grant authorization and delegate access.
Request to Refresh the Refresh Token 
https://api-ma.smartpayfuse.barclaycard
/oauth2/v3/token Content-Type: application/x-www-form-urlencoded client_id =8l57hYffFb& client_secret =yourClientSecret& grant_type =refresh_token& refresh_token =eyJraWQiOiI4MGI2ZDJjM2NkZGRkMmY2NmY3MmRjYjIyMmZiNGM1MCIsImFsZyI6IlJTMjU2In0. eyJqdGkiOiI0N2E4OGY0MS04ZTI5LTRhMTQtOWZlYi0wZjM0OTM2ZDk0M2QiLCJzY29wZXMiOlsi cmVhZCIsIndyaXRlIiwiZGVsZXRlIl0sImlhdCI6MTQ3MTU3MDEyODQ5OCwiY2xpZW50X2lkIjoi OGw1N0lZZmZGYiIsIm1lcmNoYW50X2lkIjoiMzI1MzY4IiwiZXhwaXJlc19pbiI6MTQ3MTU5ODky ODQ5OH0.lDvGlZvjkgY5pcJEG5Y1d6o7mOiZA-up2MsGm6zVhZdZxiSDt7md7Ih4_Lkko63_ -Fz6UXMg7SLt6ypVJqn3u2iqKRy8aiuSxhQCwAuenoqFFdsFEEqlqkEtDZeo6B3_YrrTeCdjyP_ cpLf7vr9GKJS3k5snYGhL8sZrEQMxJaQsyz6F_IPrxajmMiLt4nJUJJgRTjF-krt8p-BBLGxOYCB Xe8UPrpsmLnxlEPiwJcFYREimEMSkeD2uDShWXe-
Response from Refreshing the Refresh Request
/1.1 200 OK Content-Type: application/json;charset=UTF-8 Cache-Control: no-store Pragma: no-cache { "access_token": "eyJraWQiOiI4MGI2ZDJjM2NkZGRkMmY2NmY3MmRjYjIyMmZiNGM1MCI sImFsZyI6IlJTMjU2In0.eyJqdGkiOiI0Y2E5NGUyNy04NzkzLTRmOGQtYjY4YS01OWM0Mj MwODlhZDAiLCJzY29wZXMiOlsicmVhZCIsIndyaXRlIiwiZGVsZXRlIl0sImlhdCI6MTQ3M TU3MDE5NjM0MiwiY2xpZW50X2lkIjoiOGw1N0lZZmZGYiIsIm1lcmNoYW50X2lkIjoiMzI1 MzY4IiwiZXhwaXJlc19pbiI6MTQ3MTU5ODk5NjM0Mn0.cmYor7iW6lxRCiM3kWPKauMsiKN GwRrrRFKowcTdkRQewqbQ0Mn9As1RhZwDKL4duxCzAzLw4e8aV8PUyd2-_eCUsqbPMWLWjG o75eU8GI9rrvSGTxEP-fr6jPAr-jBJekQTzMLgkKVtSGaJgtz08dHqrJnrejR8rZs4h1GpP Mk6i99cOVMHjuTV7ZzognvkLKj_OR01H4XK5M8TWH5uoAXWrII3K-JJV1YkzjpVkpS0tVXTIXJI-pk_ eNeBaJ7Q6in9X3xQKXnIqA8I8zxZt3LNnxR-aui2yufzP5BDh2kfwU0B1Uq8fEuqNmbj4HN1NrmnTHkRJTZ4ooYoqAQtnQ", "token_type": "bearer", "refresh_token": "eyJraWQiOiI4MGI2ZDJjM2NkZGRkMmY2NmY3MmRjYjIyMmZiNGM1MCI sImFsZyI6IlJTMjU2In0.eyJqdGkiOiI4N2IxNDg2MC03YzI0LTQ0NmQtOWJlYS05Mzk2ZDI 3MmNmOWQiLCJzY29wZXMiOlsicmVhZCIsIndyaXRlIiwiZGVsZXRlIl0sImlhdCI6MTQ3MTU 3MDE5NjMyMywiY2xpZW50X2lkIjoiOGw1N0lZZmZGYiIsIm1lcmNoYW50X2lkIjoiMzI1MzY 4IiwiZXhwaXJlc19pbiI6MTQ3MTU5ODk5NjMyM30.Fn8ZlXgvGBr-uvDi6e7-72g8tP-u42T 5FNW5NW4YQ7GkrMqUEthexGc9NOcf6uWYfSD4EiSbDVO8EIojZzIUgyXmG3tYDgSejFcDSPc MrF11m9WkOcapbIFTnFk2OyPVi48BVZ6vNb7j2184pJ3KHKoq9E7qlaKrEbvBn2HRVdtvb1y j1Xv1tH38I6Qong8xMAEMCcIfzTinEOFIbENYzgxBsSNVrS15CYtDRFEDPGmAVPzd4I7HN_ ed-pzOET3YbUBBQUbrAuZSrSrBcgfBCtT9C5szd7tYXmi-1AMVdFybnVXArAXsDX0nZzm-PuCi_DGKMJET0sY2QNyesyKv8w", "expires_in": 899, "scope": "transactions", "refresh_token_expires_in": 31535999, "client_status": "active"}