You must be a Growth Method administrator to do this.
If you have a Twilio account with a phone number, you can integrate Twilio and use the associated number in Growth Method. If you don't have a Twilio account, you can Let Growth Method Manage Phone Numbers.
Log in to your Growth Method account.
Click Integrations, then Twilio.
Select Let Growth Manage Phone Numbers or I Have a Twilio Account.
Select Let Growth Method Manage Phone Numbers (skip this step if you already have a Twilio account):
Enter your business information: EIN, name, website, type, industry, and address.
Twilio receives this request and must approve it before you can finish integrating. Phone numbers are activated a few days after you submit your business information.
When Twilio approves the request, your Twilio integration screen displays I Have a Twilio Account.
Select I Have a Twilio Account:
Enter your Twilio Account SID.
Enter your Twilio Auth Token.
Click Save.
You've successfully integrated Twilio with your Growth Method account. Now Growth Method can manage campaign numbers and mobile office numbers. Next, assign mobile office numbers to staff members.