Words like "type" are keywords in Rust, but they are also common field names. Rust allows you to use a keyword as a field identifier if it begins with r#.
Docs example
Tiberius currently treats the prefix as part of the field name, causing errors when using FromRow:
Error: Conversion("Could not find column with index r#type")
When r# is encountered at the beginning of an identifier name, it should be ignored so that db fields with Rust keywords as their names can be mapped onto structs correctly.