fe_sendauth: no password supplied
spring.datasource.url=jdbc:postgresql://localhost:5432/great_traveler
spring.datasource.username=root
spring.datasource.password=1234
spring.jpa.generate-ddl=true# IPv4 local connections:
host all all 127.0.0.1/32 md5
# IPv6 local connections:
host all all ::1/128 md5
# Allow replication connections from localhost, by a user with the
# replication privilege.
host replication all 127.0.0.1/32 md5
host replication all ::1/128 md5
https://www.w3schools.com/sql/sql_exists.asp.