Refresh Token
POST https://sandbox.swift.com/oauth2/v1/token
Request Body
[{"name"=>"refresh_token", "value"=>"{{refresh_token}}", "datatype"=>"string"}, {"name"=>"grant_type", "value"=>"refresh_token", "datatype"=>"string"}]
POST https://sandbox.swift.com/oauth2/v1/token
[{"name"=>"refresh_token", "value"=>"{{refresh_token}}", "datatype"=>"string"}, {"name"=>"grant_type", "value"=>"refresh_token", "datatype"=>"string"}]