az login --help Log in to Azure.

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$ az login --help

Command
    az login : Log in to Azure.

Arguments
    --allow-no-subscriptions : Support access tenants without subscriptions. It's uncommon but
                               useful to run tenant level commands, such as 'az ad'.
    --password -p            : Credentials like user password, or for a service principal, provide
                               client secret or a pem file with key and public certificate. Will
                               prompt if not given.
    --service-principal      : The credential representing a service principal.
    --tenant -t              : The AAD tenant, must provide when using service principals.
    --use-cert-sn-issuer     : Used with a service principal configured with Subject Name and Issuer
                               Authentication in order to support automatic certificate rolls.
    --use-device-code        : Use CLI's old authentication flow based on device code. CLI will also
                               use this if it can't launch a browser in your behalf, e.g. in remote
                               SSH or Cloud Shell.
    --username -u            : User name, service principal, or managed service identity ID.

Managed Service Identity Arguments
    --identity -i            : Log in using the Virtual Machine's identity.

Global Arguments
    --debug                  : Increase logging verbosity to show all debug logs.
    --help -h                : Show this help message and exit.
    --output -o              : Output format.  Allowed values: json, jsonc, none, table, tsv, yaml.
                               Default: json.
    --query                  : JMESPath query string. See http://jmespath.org/ for more information
                               and examples.
    --verbose                : Increase logging verbosity. Use --debug for full debug logs.

Examples
    Log in interactively.
        az login


    Log in with user name and password. This doesn't work with Microsoft accounts or accounts that
    have two-factor authentication enabled.
        az login -u [email protected] -p VerySecret


    Log in with a service principal using client secret.
        az login --service-principal -u http://azure-cli-2016-08-05-14-31-15 -p VerySecret --tenant
        contoso.onmicrosoft.com


    Log in with a service principal using client certificate.
        az login --service-principal -u http://azure-cli-2016-08-05-14-31-15 -p ~/mycertfile.pem
        --tenant contoso.onmicrosoft.com


    Log in using a VM's system assigned identity
        az login --identity


    Log in using a VM's user assigned identity. Client or object ids of the service identity also
    work
        az login --identity -u /subscriptions/<subscriptionId>/resourcegroups/myRG/providers/Microso
        ft.ManagedIdentity/userAssignedIdentities/myID


For more specific examples, use: az find "az login"