API prevents users from reading their own details when they don't have view permissions, which they don't by default.
UI normally allows users to view their profile.

Reproducible with hammer:

# Use admin account to create a user with default set of permissions
> hammer user create --login test --password changeme --auth-source-id 1 --mail test@test.org
> hammer -u admin user info --login test
Id:                    39
Login:                 test
Name:                  Test Test
Email:                 test@test.org
Admin:                 no
Last login:            2017/06/26 21:37:54
Authorized by:         Internal
Effective admin:       no
Locale:                default
Timezone:              
Description:           
Default organization:  
Default location:      
Roles:                 
    Default role
User groups:           

Inherited User groups: 

Organizations:         
    Default Organization
Created at:            2017/06/22 12:22:05
Updated at:            2017/06/26 21:38:19

# Use the just created account to read its own details
> hammer -u test user info --login test
Access denied
Missing one of the required permissions: view_users

Expected results:
Api should allow users to read their own details even without view permissions the same way UI does.