If you manage multiple teams, you can them all to your Teammo account. This means you can switch quickly between teams, without needing multiple Teammo accounts. To do this, click on the three dots next to your team name in the menu (see below).
Then, click Create Team and follow the prompts. For more details on adding new teams: http://help.teammo.com.au/en/articles/1379373-setting-up-a-new-team.
You can connect to your association via https://app.teammo.com.au/connect-team.