Solution
The Lemmy server appears to have a database limit of 255 characters ^[2]^; however, individual instances appear to put their own limits on username length though the frontend ^[3]^ and/or the API ^[4.1][4.2]^.
Original Post
If you know, please also provide relevant documentation.
UPDATE (2025-02-02T06:06Z): I did some brute-force testing, and, at least for sh.itjust.works, it seems that the maximum username length is 50, and the maximum password length is 60 ^[1]^.
References
- "Sign Up". sh.itjust.works. Lemmy. Accessed: 2025-02-02T08:49Z. https://sh.itjust.works/signup.
- When creating an account on sh.itjust.works, the sign-up form will throw this error if the provided password is greater than 60 characters in length.
- @[email protected] To: ["[SOLVED] What is the maximum username length for a Lemmy account?". "Kalcifer" @[email protected]. "Lemmy Support" [email protected]. sh.itjust.works. Lemmy. Published: 2025-02-03T00:54:51Z. https://sh.itjust.works/post/32085936.]. Published: 2025-02-02T05:57:26Z. Accessed: 2025-02-03T00:44Z. https://sh.itjust.works/post/32085936/16442382.
- They pointed to code on GitHub for the Lemmy server which outlines the length of the username data in the SQL database.
- "[SOLVED] What is the maximum username length for a Lemmy account?". "Kalcifer" @[email protected]. "Lemmy Support" [email protected]. sh.itjust.works. Lemmy. Published: 2025-02-03T00:54:51Z. Accessed: 2025-02-03T00:46Z. https://sh.itjust.works/post/32085936.
- §"Original Post". ¶2.
[…] I did some brute-force testing, and, at least for sh.itjust.works, it seems that the maximum username length is 50 […]
- The maximum username length for sh.itjust.works was found to be 50 characters by brute-force testing the length limit.
- §"Original Post". ¶2.
- "Andrew" @andrew_[email protected] To ["[SOLVED] What is the maximum username length for a Lemmy account?". "Kalcifer" @[email protected]. "Lemmy Support" [email protected]. sh.itjust.works. Lemmy. Published: 2025-02-03T00:54:51Z. https://sh.itjust.works/post/32085936.] Published: 2025-02-02T19:57:49Z. Accessed: 2025-02-03T00:59Z. https://sh.itjust.works/post/32085936/16453656.
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curl -L http://lemmy.world/api/v3/site | jq -r .site_view.local_site.actor_name_max_length(26)- The maximum username length for Lemmy.world was found to be 26 characters via an API request.
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curl -L http://sh.itjust.works/api/v3/site | jq -r .site_view.local_site.actor_name_max_length(50)- The maximum username length for sh.itjust.works was found to be 50 characters via an API request.
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That was never my argument. I think you know this.
Being reluctant to answer any more questions about a topic doesn't mean I was wrong to provide an initial answer. It just means my bandwidth has been exceeded. If Lemmy was a project I was invested in, and I didn't think your second follow-up question was disingenuous, then it would've been different, but as things were, I resented being given homework about it.
Perhaps I misunderstood you. When I read this:
I interpreted it to litterally mean that I shouldn't ask you questions about Lemmy because you don't use it. I interpret your statement that you don't use Lemmy to mean that you are less likely to have knowledge about Lemmy because you don't use it.
At any rate, this is moot, as I mentioned above that I cannot know, prior to you telling me, what your experience is. And furthermore, I didn't ask you anything. You volunteered an answer.
For clarity, it wasn't intended to be disingenuous. I apologize if I gave you that impression. I'm always trying to improve how I interact with others.