Assign Curl command to a variable in shell script

Question

I'm trying to get values from nexus and assign it to a variable using curl command

The curl command i use

curl -u user_name:password --request GET "http://host_name:portnumber/URL

This works as expected in postman

when i try assigning this curl command to a variable and print it with this command

var=$(curl -u user_name:password --request GET "http://host_name:portnumber/URL)
echo $var

I couldn't see the value i get when i use the curl command in postman .

Please help to on this issue . thanks in advance .