Please create a staff account using "support@thimatic.com", Refer this URL how to create staff account
https://help.shopify.com/manual/your-account/staff-accounts/create-staff-accounts
Please give us the Apps, Pages, Products, and Themes section permissions.
Use the following details while you are creating a staff account.
First Name: Thimatic
Last Name: Apps
Email Address: support@thimatic.com