var user = current.variables.user; // considering sysid of user
var role = current.variables.role; // considering sysid of role
var group = current.variables.group; // considering sysid of group
If you want to give access directly as role
var userRole = new GlideRecord("sys_user_has_role");
userRole.initialize();
userRole.user = user;
userRole.role = role;
userRole.insert();
If you want to give access directly as group
var userGroup = new GlideRecord("sys_user_grmember");
userGroup.initialize();
userGroup.user = user;
userGroup.group= group;
userGroup.insert();
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Please mark correct if my response has solved your query.
Cheers,
Mohammed Basheer Ahmed.
