Further stuff

[112batuhan]

Don't get confused by branch name. I speedrun the name.

• Added map crud to users and influences
• Adding new user on adding influence
• logout
• Checking user ranked map count and add a flag
• mention endpoint
• adding mention count to user endpoints
• beatmap search endpoint
• Separate Leaderboards for users with ranked maps and without them

[112batuhan]

we have many new changes. But I think I added everything @Fursum wanted. From now on we can focus on improving the error handling and logging.