Hangouts Chat works in a special way, users should first give permissions to DailyBot and create their account before you can actually invite them to teams, etc.
Ask your team members to add DailyBot and create their account
Each member that wants to be part of the DailyBot organization should:
- Open Google Hangouts Chat
- Add DailyBot
- Send a message to DailyBot
- Then complete the signup instructions
Once all the members are part of the organization, you can create teams or invite them to your current teams.