Method, server and user terminals for grouping and managing messenger service users

A server for grouping and managing messenger service users, the server comprising:

• a memory;
• and
• a processor connected to the memory and configured to execute instructions stored in the memory,
• wherein the processor is further configured to:
• receive a request to create a group from a first user;
• determine whether the first user is eligible to create the group;
• receive a request from the first user to invite a second user to the group, wherein the second user corresponds to a friend of the first user in a messenger service operated by the processor;
• send, through the messenger service, an invitation message to invite the second user to the group;
• receive, from the second user, a response indicating that the invitation is accepted;
• determine whether the second user is eligible to join the group;
• provide, to a second user terminal of the second user, interface information for obtaining eligibility to join the group;
• and
• manage the first user and the second user in the group,
• provide, to a first user terminal of the first user, group management interface information for displaying a current status of users in the group and for receiving an interaction to change a representative of the group;
• receive, via the group management interface information, from the first user, a request to change the representative of the group from the first user to a target user in the group;
• in response to receiving the request, determine whether the target user is eligible to be the representative of the group;
• and
• change the representative of the group to the target user based on determining that the target user is eligible to be the representative of the group, wherein eligibility to be the representative of the group is the same as eligibility to create the group,
• wherein the first user is determined to be eligible to create the group based on whether the first user satisfies a predetermined first age criterion,
• wherein the interface provided to the second user differs depending on whether the second user satisfies a predetermined second age criterion, and
• wherein the first age criterion and the second age criterion are different from each other.

A method for a user terminal to group and manage users of a messenger service, the method comprising:

• receiving an interaction requesting creation of a group of users, which is a subset of the users of the messenger service;
• displaying an interface for performing authentication to confirm a user's year of birth;
• displaying candidate friends allowed for the user to invite to the group, wherein the candidate friends are at least a part of friends of the messenger service to which the user has joined, and wherein the user is the group creator and a representative of the group;
• receiving a friend interaction for selecting a friend to be invited to the group from among the candidate friends;
• displaying a group management interface configured to display a current status of the users in the group;
• receiving, via the group management interface, an interaction requesting to change the representative of the group to a target user in the group;
• transmitting, to a server, a request to change the representative of the group to the target user;
• and
• displaying completion of the change of the representative of the group based on a determination by the server that the target user is eligible,
• wherein the eligibility to become the representative of the group is the same as the eligibility to create the group,
• wherein the user is determined to be eligible to create the group based on whether the user satisfies a predetermined first age criterion,
• wherein the friend is determined to be eligible to join the group based on whether the friend satisfies a predetermined second age criterion, and
• wherein the first age criterion and the second age criterion are different from each other.