Hello ESS,
Thank you for reaching out to Constant Contact API Developer Support. My team is here to assist outside software developers with questions about building into Constant Contact's API.
After taking a look through Contact Form 7’s documentation, I wasn’t able to find a feature that would allow for securely storing passwords. You may want to check with Contact Form 7’s support team in case this type of functionality exists, however, I would not recommend passing this type of sensitive information over to Constant Contact, as there isn’t a secure method for that field to be passed over to Constant Contact or to be stored within a Constant Contact account.
Please have a look and let us know if you have any other questions!
Regards,
John B.
API Support Specialist
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