Add `get_database_connection()`

Function to establish a database connection using a connection pool.

Update `Purchaser::insert()` to take a `PooledConn` instead of a simple
`Conn`.

1 files changed, 2 insertions, 0 deletions

diff --git a/license-generator/src/errors.rs b/license-generator/src/errors.rs
index 7eb9eda..29f25ca 100644
--- a/license-generator/src/errors.rs
+++ b/license-generator/src/errors.rs
@@ -2,6 +2,8 @@ use mysql;
 
 error_chain! {
     foreign_links {
+        EnvVar(::std::env::VarError);
+
         MySql(mysql::error::Error);
     }
 }