Methods and systems for service interworking between servers using different user identification systems

A service interworking method to identify registered users using different user identification systems performed by a first server having at least one processor configured to identify registered users using a first user identification system, the method comprising:

• receiving, using the at least one processor, a first identifier identifying a first user in the first user identification system and a first reference identifier of the first user generated at a second server configured to identify registered users using a second user identification system;
• identifying, using the at least one processor, the first user based on the first identifier in response to the receiving;
• and
• managing, using the at least one processor, the first reference identifier in association with the first user in response to the receiving and the identifying;
• wherein the first user is identified at the second server based on a second identifier of the second user identification system.

A service interworking system of a first server configured to identify registered users using a first user identification system, the system comprising:

• a memory having computer-readable instructions stored thereon;
• and
• one or more processors communicatively coupled to the memory and configured to execute the computer-readable instructions to
• generate a first reference identifier of a first user in association with a first identifier identifying the first user in the first user identification system,
• manage the first reference identifier in association with the first identifier,
• receive a second identifier identifying the first user in a second user identification system, from the first user, and
• transmit the first reference identifier and the second identifier of the first user to a second server configured to identify registered users using the second user identification system.