http://localhost:8080/oauth2/oauth/token?grant_type=password&client_id=rajith-client-id&client_secret=12345&username=rajith&password=password

{
 access_token: "f833a754-0d6c-4595-92c8-99b202ea6dd4"
 token_type: "bearer"
 refresh_token: "967068eb-13d1-4d18-8dd8-b89b2124d5d6"
 expires_in: 4
 scope: "read trust write"
}

http://localhost:8080/oauth2/oauth/token?grant_type=refresh_token&client_id=rajith-client-id&refresh_token=967068eb-13d1-4d18-8dd8-b89b2124d5d6&client_secret=12345

{
access_token: "d78dd4c7-41c3-443d-a85e-3716ceefc66f"
token_type: "bearer"
refresh_token: "967068eb-13d1-4d18-8dd8-b89b2124d5d6"
expires_in: 4
scope: "read trust write"
}