hi i am trying to find a possible way to remove similar id keys and pass
back just each different one , for example i have a photo gallery each photo
has a userID key of who the photo was taken by i would like to grab all the
id for each photo and pass back just one result of the different people who
have taken the photos

so i append them all like 1, 1, 1, 1, 2, 1, 2, 1, 3 and i just want to get
back 1, 2, 3 keys?

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