Upload the letterhead image (base64 encoded)
POST/admin/api/system/letterhead
Accepts a base64 data URI (JPEG, PNG, GIF or WebP), downscales it to fit 2400x600 and stores it as Images/church-letterhead.png.
Request​
Responses​
- 200
- 400
- 401
- 403
- 413
Letterhead stored
Missing or unsupported image data
Unauthorized
Admin role required
Image exceeds the server upload limit or the source image size limit
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