In order to authenticate SendSafely add-in components, you will need to use an API Key and API Secret. The API Key and API Key Secret are essentially software-level credentials that allow a program to access your account without the need for providing your actual username and password to the software.
To obtain a new API Key and API Secret, log in to your SendSafely account and go to the Edit Profile page. From there you should see an API Access Keys section that allows you to manage your API Keys. Provide a unique description of what the key will be used for (i.e. “Outlook Plug-In” or "Chrome Extension") and press the “Generate New Key” button. The newly created API Key and API Key Secret will be displayed on the page.
Please note that for security reasons, the API Secret will never be displayed again. Never share your API Key or API Secret with ANYONE. These values can be used to access all of your account data and should be treated the same as a username and password.