sslaccept=accept_invalid_certs seems to not be the default

[P4sca1]

Bug description

I am trying to connect to a MySQL database, with a user that has the REQUIRE SSL option set.

The following error appears:

[1657368933547] FATAL: Startup failed
    err: {
      "type": "PrismaClientInitializationError",
      "message": "Authentication failed against database server at `[omitted]`, the provided database credentials for `[omitted]` are not valid.\n\nPlease make sure to provide valid database credentials for the database server at `[omitted]`.",
      "stack":
          Error: Authentication failed against database server at `[omitted]`, the provided database credentials for `[omitted]` are not valid.
          
          Please make sure to provide valid database credentials for the database server at `[omitted]`.
              at [omitted]/node_modules/@prisma/client/runtime/index.js:45403:20
      "clientVersion": "4.0.0",
      "errorCode": "P1000"
    }

The MySQL server uses a self-signed certificate.

How to reproduce

You need a MySQL server which allows SSL connections and uses a self-signed certificate. This is the default behaviour in MySQL.

1. Enable the REQUIRE SSL option for your MySQL user: ALTER USER 'myuser'@'myhost' REQUIRE SSL
2. Start your prisma application

Expected behavior

The connection should be successfully established using default options. According to the docs, sslaccept=accept_invalid_certs is the default. However, this does not seem to be the case, because the connection does not work. When I manually add ?sslaccept=accept_invalid_certs to the database URL, the connection gets established successfully.

Prisma information

Not working database url: mysql://myuser:mypassword@dbhost:3306/database Working database url: mysql://myuser:mypassword@dbhost:3306/database?sslaccept=accept_invalid_certs

Environment & setup

• OS: MacOS 12.3
• Database: MySQL 8.0.29
• Node.js version: 16.13.0

Prisma Version

prisma                  : 4.0.0
@prisma/client          : 4.0.0
Current platform        : darwin
Query Engine (Node-API) : libquery-engine da41d2bb3406da22087b849f0e911199ba4fbf11 (at node_modules/prisma/node_modules/@prisma/engines/libquery_engine-darwin.dylib.node)
Migration Engine        : migration-engine-cli da41d2bb3406da22087b849f0e911199ba4fbf11 (at node_modules/prisma/node_modules/@prisma/engines/migration-engine-darwin)
Introspection Engine    : introspection-core da41d2bb3406da22087b849f0e911199ba4fbf11 (at node_modules/prisma/node_modules/@prisma/engines/introspection-engine-darwin)
Format Binary           : prisma-fmt da41d2bb3406da22087b849f0e911199ba4fbf11 (at node_modules/prisma/node_modules/@prisma/engines/prisma-fmt-darwin)
Default Engines Hash    : da41d2bb3406da22087b849f0e911199ba4fbf11
Studio                  : 0.465.0

[P4sca1]

This also results in MySQL connections from prisma to be unencrypted by default, because the certificate is not trusted and it then falls back to unencrypted connections.