SuperTokens is an open source authentication solution offering features like: Different types of login: Email / password, Passwordless (OTP or Magic link based).

SuperTokens.com

Facing issue connecting to an AWS RDS Mysql DB. Getting error: "What caused the crash: Failed to initialize pool: Index 1 out of bounds for length 1"

What config are you giving to the core to connect to the db?

docker run \
    -p 3567:3567 \
    -e MYSQL_USER="username" \
    -e MYSQL_PASSWORD="password" \
    -e MYSQL_HOST="host" \
    -e MYSQL_PORT="3306" \
    -e MYSQL_DATABASE_NAME="supertokens" \
    -d registry.supertokens.io/supertokens/supertokens-mysql

And just adding the user password host and db name credentials provided by aws rds

Worked. My bad, the database was not present in RDS. Forgot to create it first.