Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE useracct (name VARCHAR, u_id VARCHAR)
TABLE: CREATE TABLE trust (source_u_id VARCHAR)

### Question ###
Find the name of the source user with the highest average trust score.

### Accurate SQL ###

SELECT T1.name FROM useracct AS T1 JOIN trust AS T2 ON T1.u_id = T2.source_u_id GROUP BY T2.source_u_id ORDER BY AVG(trust) DESC LIMIT 1