bug: ibis.impala.connect() uses user instead of username parameter

[Isaamarod]

What happened?

The ibis.impala.connect() function accepts 'user' as parameter name, but the documentation shows 'username'. Using 'username' fails to authenticate, while 'user' works correctly. This is inconsistent with other ibis backends that use 'username'.

This fails or doesn't authenticate properly:

client = ibis.impala.connect(
host='your-host',
port=443,
username='user123', # ❌ Doesn't work
password='pass',
)

This works:

client = ibis.impala.connect(
host='your-host',
port=443,
user='user123', # ✅ Works
password='pass',
)

What version of ibis are you using?

11.0.0

What backend(s) are you using, if any?

Impala

Relevant log output

username unexpected

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