Brief description of study – 2-3 sentences (the Study assess the role of African Union Election Observation Mission (AUEOM) on transparency and credibility of 2015 and 2019 General election in Nigeria. In achieving the research objective, the study seeks to answer the following question; and Trust Building Mechanisms in Nigeria? And Does the African Unions Election Observation Mission contribute to transparent and credible elections during the conduct of 2015 General election in Nigeria?)