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Authentication vocabularyphrasal verb · /lɒɡ ɪn æz/

log in as

In simple English

Access a computer system or application using a particular user profile or role, typically for testing permissions, reproducing bugs, or verifying features from another user's perspective.

What does "log in as" mean when someone asks me to test a feature using a different account?

At a glanceCEFR A2–B1
Commonness
Versatility
FormalityCasualFormalNeutral
Spoken ↔ WrittenSpokenWrittenBoth
Directness ↔ DiplomaticDirectDiplomaticNeutral
Region

Say it like this

✓Can you log in as the test user and check if the button appears?
✓I logged in as an admin and the bug doesn't happen.
✓Try logging in as a guest to see what they see.
✓You'll need to log in as a different role to access that page.
✓Let me log in as the customer who reported this.

Real examples

Standup

"I'm going to log in as a regular user today to verify the permissions fix."

Slack message

"Can you log in as the test account and check if the export button is visible?"

GitHub PR

"Tested by logging in as both admin and standard user—works correctly in both cases."

Jira ticket

"To reproduce: log in as a guest user and try to access the dashboard."

Retrospective

"We caught more edge cases this sprint because we started logging in as different user roles."

Sprint planning

"This story needs QA to log in as multiple user types to verify access levels."

Pair programming

"Let me log in as the staging admin so we can see the full menu."

Don't say this

✕I will login as admin.
✓I will log in as an admin.— 'Log in' is two words as a verb. Also, use 'an admin' (with article).
✕Can you log in like a test user?
✓Can you log in as a test user?— Use 'as' (not 'like') when specifying the role or account you are using.
✕Please log in as administrator.
✓Please log in as an administrator.— Use the article 'an' before 'administrator' when it refers to a type of user.

Other forms

base form

log in as

"You need to log in as a different user."

past tense

logged in as

"I logged in as the admin yesterday."

present participle

logging in as

"Try logging in as a guest."

noun form

login

"Use the admin login to access settings."

Often used with

log in as an adminAccess the system with administrator privileges.
log in as a test userUse a test account for QA or debugging.
log in as a guestEnter the system without a full account.
log in as a different roleSwitch to another permission level.
log in as the customerUse the customer's account to reproduce their issue.

Similar words

sign in asSame meaning; 'sign in' is slightly more common in consumer apps.
authenticate asMore technical; used in security or backend contexts.
switch toInformal; implies changing accounts without full logout.
impersonateAdmin feature to act as another user without their password.

Opposites

log outsign outdisconnectend session

Practice

Try it

4 quick exercises

Choose the most natural sentence

1. You want a teammate to test a feature as a guest.

Find the error

2. I will login as the admin to check the settings.

Complete the sentence

3. To reproduce this bug, ___ as a new user and try to submit the form.

Rewrite more naturally

4. Please enter the system using the administrator account.

More words

sign inlog outauthenticationpermissionsuser roletest accountimpersonate

Questions

Quick poll

Have you said "log in as" in a standup this week?

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