Update an Existing Tag
POST /user/tag/{tag}
Update user's tag
POST /rest/user/tag/{tag}?{newName}&{visibleForGroup}&{updatableByGroup}&{untagOnResolve}
Sample
POST http://localhost:8081/rest/user/tag/tag%201?newName=new+tag+1&visibleForGroup=idea-admins&updatableByGroup=idea-admins
Cookie: $Version=0; JSESSIONID=1hsabc83ru0xantrxqho4idzk; $Path=/; jetbrains.charisma.main.security.PRINCIPAL=MTVhMjY2OGUxMTUxMTI5MGMzNjhlZWM5NTJiNGJkNmIyNzc3NjdjZmM3YWU4MTVjYzQwYWE1MWZlYTkwNTcxNzphcHBfZXhjZXB0aW9u; $Path=/
HTTP/1.1 301 Moved Permanently
Content-Type: application/xml;charset=UTF-8
Location: https://example.com/youtrack/rest/user/tag/new%20tag%201
Content-Length: 0
Server: Jetty(7.2.0.v20101020)
Last modified: 2 February 2017