When submitting timesheet we can't mention users who uses an email address as username

Description

Since we prefix username with @ sign our parser can't correctly parse usernames in the format user@example.com. Also it is ugly when using @: @user@exmple.com. Instead of @ sign we should use ~ sign.

Environment

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Priority

Major

Assignee

Deniz Oğuz

Reporter

Deniz Oğuz

Affects versions

None

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