imtest -u <user> not what I think it is?

[Jeff Blaine]

Why is 'cyrus' not being used as the user below?

bin:imap> ./imtest -u cyrus -v -m login
WARNING: no hostname supplied, assuming localhost

S: * OK [CAPABILITY IMAP4 IMAP4rev1 LITERAL+ ID STARTTLS AUTH=PLAIN 
SASL-IR] imap.foo.com Cyrus IMAP v2.x server ready
Please enter your password:
C: L01 LOGIN jblaine {8}  <-------------------------
S: + go ahead
C: <omitted>
S: L01 NO Login failed: generic failure
Authentication failed. generic failure
Security strength factor: 0
^CC: Q01 LOGOUT
Connection closed.
bin:imap> sudo ./imtest -u cyrus -v -m login
WARNING: no hostname supplied, assuming localhost

S: * OK [CAPABILITY IMAP4 IMAP4rev1 LITERAL+ ID STARTTLS AUTH=PLAIN 
SASL-IR] imap.foo.com Cyrus IMAP v2.x server ready
Please enter your password:
C: L01 LOGIN root {8}  <----------------------------
S: + go ahead
C: <omitted>
S: L01 NO Login failed: generic failure
Authentication failed. generic failure
Security strength factor: 0
^CC: Q01 LOGOUT
Connection closed.