How can I automatically log in a participant?

If your campaign is configured to NOT have participants login/authenticate:

• Manually via participant: Your participants can enter the same email into the signup form and their existing information will be returned.
• Automatically via grsf_email URL parameter: You can provide your participants a URL with a grsf_email parameter. If they clicked on the link and landed on the webpage, the person will be automatically logged in (or added as a new participant, if they did not already exist).
• Automatically via embeddable elements: To automatically authenticate the participant, use the data-grsf-email attribute with the GrowSurf embedded form
• Automatically via JavaScript: To automatically authenticate the participant, use the growsurf.addParticipant() function

If your campaign is configured to have participants login/authenticate:

• Manually via Participant: Your participants can click the 'login' link and an email with a one-time authentication link will be sent to them
• Automatically via Participant Auto Authentication: You can set up  Participant Auto Authentication to automatically log participants into their browser (requires server code).