curl --request POST \
--url https://api.cello.so/token \
--header 'Content-Type: application/json' \
--data '{
"accessKeyId": "<accessKeyId>",
"secretAccessKey": "<secretAccessKey>"
}'
{
"accessToken": "<accessToken>",
"refreshToken": "<refreshToken>",
"expiresIn": 18000,
"refreshTokenExpiresIn": 432000
}