From man mysqldump:
–password[=password], -p[password]
The password to use when connecting to the server. If you use
the short option form (-p), you cannot have a space between the option
and the password. If you omit the password value following the
–password or -p option on the command line, you are prompted for
one.
Specifying a password on the command line should be considered
insecure. See Section 6.6, “Keeping Your Password Secure”.
Syntactically, you are not using the –password switch correctly. As such, the command line parser is seeing your use of “lose” as a stand-alone argument which mysqldump interprets as the database name as it would if you were to attempt a simpler command like mysqldump lose
To correct this, try using --password=lose or -plose or simply use -p or --password and type the password when prompted.