configure temp aws cli user still existing a default cli user

How can I configure a temporary AWS-CLI user if I already have a default user in the .aws/ path ??? if I could create a temp user, I could test my task without interfering default user !!

You can add temp user as follows:

export AWS_ACCESS_KEY_ID=<your AWS_ACCESS_KEY_ID >
export AWS_SECRET_ACCESS_KEY=<your AWS_SECRET_ACCESS_KEY>
export AWS_REGION=<your AWS_REGION>

When you set these values, you will be able to see similar like these:

{
    "Account": "2*********4", 
    "UserId": "A*****************V", 
    "Arn": "arn:aws:iam::275*******04:user/s3ba*****ser"
}

Once you are done, do the rest :

unset AWS_ACCESS_KEY_ID
unset AWS_SECRET_ACCESS_KEY
unset AWS_REGION