To add an API user for a 3rd party developer:
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In your Maropost Commerce control panel, navigate to Settings & tools > Staff users.
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Click the Add new staff user button.
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Complete the required fields:
    - Username
 - First Name
 - Last Name
 - Email address (cannot be the same as another staff user)
 - Password
 
    
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Click the Regenerate button to create an API key for this user.
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In the User Permission Group dropdown menu select API User.
    Tip: You can also create a custom permission group by clicking on the 
Add or Edit User Permission Groups link. We recommend that you clone the API user group and then add or remove permissions.
    

     
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Click the Save button.
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Provide your developer or third party the below information:
    
     
Your developer or 3rd party integration will now be able to connect to your control panel using these credentials.
Tip: To revoke access make the user account Inactive.