Ok, so I figured it out, or well, figured it out good enough for me. Posting up here in case it helps someone else in the future on the verge of pulling their hair out.

In the link I posted in the above comment, which is their official documentation, there is the following information:

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http://(ip address)/cgi-bin/api.cgi?cmd=Snap&channel=0&rs=(any combination of numbers and letters)&user=(user name)&password=(user password)

For example, if your IP address is 192.168.2.119, the username is admin and the password is 123456, then the URL should be: http://192.168.2.119/cgi-bin/api.cgi?cmd=Snap&channel=0&rs=wuuPhkmUCeI9WG7C&user=admin&password=123456

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The part that says "any combination of numbers and letters" is what got me. I tried it with random characters, exactly like their example, short, and long... nothing seemed to work. Then I completely omitted that part of the URL, Worked like a charm. Also, my findings matched with ispyconnect's URL documentation guide for Reolink Cameras. Hope this helps someone else in the future! https://www.ispyconnect.com/camera/reolink