Not Allow Editing Valid Telegram Name

[nus-se-script]

Problem: For telegram name, "BerniceYu" and "berniceYu" should be 2 different persons. When "@berniceYu" exists, I should still be allowed to change another person's telegram name to "BerniceYu" or "BERniceYu" as long as the cases are different according to real life example. However, the app stops me from editing someone else's telegram to "BerniceYu" when "berniceYu" exists. This causes inconvenience to users.

Command: edit 1 t/BerniceYu Expected: Changed successfully. Actual: "A person with same phone, email, or telegram, has already exists in the Dormie."

Screenshot:

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_{[original: nus-cs2103-AY2324S2/pe-interim#4887] [original labels: type.FunctionalityBug severity.Medium]}

[donwong2308]

Team's Response

In the real world, Telegram treats the username as case-insensitive.

Hence, @BerniceYu is the same as @berniceYU. Therefore, attempting to edit a telegram user name to @berniceYU when @BerniceYu exists is not allowed.

Furthermore, Dormie's User Guide specified that the telegram handle is case-insensitive as well.

If deemed necessary, we think that this issue should be severity.Low because users can still find the desired person's telegram

Duplicate status (if any):

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