mc admin user add 命令用来添加一个新用户，语法如下：
C:\>mc admin user add -h
NAME:
mc admin user add - add a new user
USAGE:
mc admin user add TARGET ACCESSKEY SECRETKEY
ACCESSKEY:
Also called as username.
SECRETKEY:
Also called as password.
FLAGS:
--config-dir value, -C value path to configuration folder (default: "C:\\Users\\Administrator\\mc")
--quiet, -q disable progress bar display
--no-color disable color theme
--json enable JSON lines formatted output
--debug enable debug output
--insecure disable SSL certificate verification
--help, -h show help（1）添加一个新用户 'foobar' 到 MinIO 服务器。
D:\server\minio>mc admin user add local foobar foo12345
Added user `foobar` successfully.（2）向 MinIO 服务器添加一个新用户 'foobar'，提示输入密钥。
C:\> mc admin user add myminio
Enter Access Key: foobar
Enter Secret Key: foobar12345
Added user `foobar` successfully.（3）使用管道键将新用户“foobar”添加到 MinIO 服务器。
a、将用户密钥存放到当前目录的 password.txt 文件中，内容如下：
foobar
foobar12345b、使用 type 命令和管道命令作为 mc admin user add 命令的输入信息，如下：
D:\server\minio>type password.txt | mc admin user add local
Added user `foobar` successfully.
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