If your campaign coordinator added your email address to the fundraiser, you will receive a personal invitation email with a link to your participant pledge page (be sure to check your spam folder).
In that email, there will also be a special link for you to upload your participant image. No login or password is necessary.
Here's what it looks like. Instead of {{manage_participant_url}}, your link will appear there:
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Here’s your private profile management page (Do NOT share this with anyone!):
{{manage_participant_url}}
* Upload a profile picture
* Share by email and text message
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Once you click on that special link, it will open your Manage Participant page where you can add your photo: