db.define_table(
    "lti_keys",
    Field("consumer"),
    Field("secret"),
    Field("application"),
    migrate=table_migrate_prefix + "lti_keys.table",
)
 

To generate keys, one choice is to invoke import secrets; hex(secrets.randbits(256))[2:]; this creates a 256-bit hexadecimal secret key.

 
db.define_table(
    "course_lti_map",
    Field("lti_id", "integer"),
    Field("course_id", "integer"),
    migrate=table_migrate_prefix + "course_lti_map",
)