Find AWS IAM Account a Key Belongs To

aws_find_user_key.sh

#!/bin/bash

get_keys_for_user ()
{
    aws iam list-access-keys \
        --user-name $@ \
        | jq -r '.AccessKeyMetadata[].AccessKeyId'
}

get_all_users ()
{
    aws iam list-users \
        | jq -r '.Users[].UserName'
}


get_username_for_key ()
{
    local this_key=$1
    local found_user=

    while read username
    do
        if get_keys_for_user $username | grep -q $this_key
        then
            found_user=$username
            break
        fi
    done

    if [ -n "$found_user" ]
    then
        echo $found_user
    else
        return 1
    fi
}

get_username_for_key $@