Then add users:

/ip hotspot user profile add name="Gold-10M" idle-timeout=00:20:00 keepalive-timeout=00:02:00 \ rate-limit=10M/10M session-timeout=06:00:00 shared-users=1 add name="Silver-4M" idle-timeout=00:10:00 rate-limit=4M/2M session-timeout=02:00:00 add name="Bronze-1M" idle-timeout=00:05:00 rate-limit=1M/512k session-timeout=01:00:00

This profile limits a user to 2Mbps download and 1Mbps upload.

Rate Limit: 2M/1M Burst Limit: 4M/2M Burst Threshold: 1M/512K Burst Time: 30