Implementation of a social network management system

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1. Connect to the database by providing the IP address, the name of the database and the user details as parameters.
2. Begin transaction - enter user email for which actions will be taken.
3. Rollback transaction.
4. Commit transaction.
5. Find a user's business network up to n, where n is a positive integer.
6. Add a comment for a specific article.
7. Send a message to someone else.