Pinterest api returns single val

im using the pinterest api and no matter which one be it pinterest profile,pinterest board, or pinterest pins, they all return a single image, instead of a list of pins like the currentuser’spinterestpins . i am trying to get the images for all the pins on a users pinterest board

the only way to accomplish this is to authenticate the user every single time and use the currentuser’spinterestpins api because it returns a list of their pins which isnt possible because im storing their pins in a database and dont want them to sign in everytime they wanna view their pins.

data needed: pinterest pins images of given board

data stored: pinterest board id